About indigo-400
#7D87FF is indigo-400, a tailwind v4. This page shows its rgb(125, 135, 255) / hsl(235.38, 99.96%, 74.51%) / oklch(0.6721 0.1752 277) values, WCAG contrast against black and white, an OKLCH tint-and-shade ramp, and complementary, analogous, and triadic harmonies — all computed in perceptually-uniform OKLCH.